Figure 1. Winter warming increased the relative abundances of fungal functional genes for C degradation and P utilization. Response ratios show significant increases of genes encoding xylose reductase, vanillin dehydrogenase, invertase, and phytase (indicated by ** forP < 0.01 and * for P < 0.05). C substrates are arranged in the order from labile C to recalcitrant C. Error bars indicate 95% confidence intervals of differences of functional gene data between warmed and control samples.